You must never feel badly about making mistakes

"You must never feel badly about making mistakes," explained
Reason quietly, "as long as you take the trouble to learn from
them. For you often learn more by being wrong for the right
reasons than you do by being right for the wrong reasons."

-- Norton Juster, The Phantom Tollbooth

As part of improvement, in doing better things you will always encounter mistakes that becomes a measures or guide to get things done better.

Can you improve something without mistakes? 

Face your deficiencies and acknowledge them

"Face your deficiencies and acknowledge them; but do not let
them master you. Let them teach you patience, sweetness,
insight. When we do the best we can, we never know what
miracle is wrought in our life, or in the life of another."

-- Helen Keller

Our weaknesses are normal, but don't let it direct us. Use them in a way that could make us different from what is expected.

Is it possible to change and improve the original you?

If you can't change your fate

"If you can't change your fate, change your attitude."

-- Amy Tan

They say that our life is directed, but we can do more things to improve and change its course of destiny.

Do you believe that your attitude determines your fate?

It takes generosity to discover the whole through others

"It takes generosity to discover the whole through others. If
you realize you are only a violin, you can open yourself up to
the world by playing your role in the concert."

-- Jacques Yves Cousteau

The small talent or skill we have can be used to let the world know about us through sharing.

Can you improve without participation?

A clever man reaps some benefit from the worst catastrophe

"A clever man reaps some benefit from the worst catastrophe,
and a fool can turn even good luck to his disadvantage."

-- Francois de La Rochefoucauld

The capability of thinking intelligently is a great blessing that should always be acknowledge from the provider.

 Is it a chance that you're thinking well?

There is only one success

"There is only one success - to be able to spend your life in
your own way."

-- Christopher Morley

Different person has different meaning for success, the simple explanation of success is being able to attained where you are now.

Is it hard to get succeed?

Do not be too timid and squeamish about your actions

"Do not be too timid and squeamish about your actions. All
life is an experiment. The more experiments you make the
better. What if they are a little course, and you may get your
coat soiled or torn? What if you do fail, and get fairly
rolled in the dirt once or twice. Up again, you shall never be
so afraid of a tumble."

-- Ralph Waldo Emerson

Later, you will put more regret on the things that you have not done than on the mistakes you've committed.

Which is better, no actions or more mistakes? 

Apply yourself both now and in the next life

"Apply yourself both now and in the next life. Without effort,
you cannot be prosperous. Though the land be good, you cannot
have an abundant crop without cultivation."

-- Plato

If we will just look around without using our hands, we will never experience how good life it is.

Can we achieve something by looks?